<title>Low-cost 160 x 128 uncooled infrared sensor array</title>

Self-corrected compensating measurement of bolometer signal using &#x0394;&#x03A3; modulation

“…There are several known topologies of bolometer signal readout [1] - [4]. Some of them are able to compensate selfheating phenomenon either by injection a current ramp [5] or by other compensation techniques.…”

Improved bias equalization method for suppression temperature-induced errors in microbolometer FPA over 20 K substrate temperature change

“…The known method of such equalization -BEQ method, based on change of temperature dependences S and V Ci measured in relation to substrate temperature at heating of bolometer by bias pulses, is offered and realized by Indigo Systems Corporation 4,5 . In this method the magnitude of heating of everyone bolometer is established by application of individual variations in voltage of measuring bias pulse, for example, by change of voltage δV H on the gate of sourcefollower amplifier ( D…”

“…The modeling was carried out for BEQ 4 . The root-mean-square values of temperature-induced FPN were calculated for: 1) "dark" output voltage -σ(VD), 2) signals caused by IR radiation fluxes ∆P SC -σ(VSF) and ∆P SC /2, at which maximal FPN is expected, -σ(VSH).…”

“…Application of the bias equalization (BEQ) method, based on use of unique measuring bias pulse to each of FPA elements, to control temperature-induced FPN allows to reduce the requirement to FPA temperature stabilization up to several Kelvin degrees 4,5 . Further reduction of this requirement down to elimination of temperature stabilizer from FPA design can be carried out by two ways.…”

“…Familiar equalization methods use either preliminary heating or measuring bias pulses, which are unique to each of FPA elements 4,5,7 . In the present paper possibility of further increase of equalization quality on the basis of use of joint variations in both preliminary heating and measuring bias pulses is considered by numerical modeling.…”